EP 0847025 A3 20000614 - Information recording and updating method, information recording and updating apparatus, recording medium, initializing apparatus and recording medium
Title (en)
Information recording and updating method, information recording and updating apparatus, recording medium, initializing apparatus and recording medium
Title (de)
Verfahren und Vorrichtung zum Registrieren und Aktualisieren von Daten, Registriermittel, Initialisierungsvorrichtung und Registriermittel
Title (fr)
Méthode et dispositif pour l'enregistrement et la mise à jour de données; moyen d'enregistrement, dispositif d'initialisation et moyen d'enregistrement
Publication
Application
Priority
JP 34466396 A 19961209
Abstract (en)
[origin: EP0847025A2] When an information signal recorded in a magnetic card is updated by an information recording and updating apparatus, a spectrum spread signal corresponding to the updated information signal is generated and it is then recorded superimposing to the information recorded previously in the magnetic card without erasing the old information. Since the information is spectrum spread, alternation is difficult. Moreover, the magnetic card may be discriminated whether it may be used or not by considering the old information recorded in the magnetic card when it is used. <IMAGE>
IPC 1-7
IPC 8 full level
G06F 21/24 (2006.01); G06F 21/62 (2013.01); G06F 21/64 (2013.01); G06K 19/12 (2006.01); G07F 7/02 (2006.01); G07F 7/08 (2006.01); G11B 20/10 (2006.01)
CPC (source: EP US)
G06K 19/12 (2013.01 - EP US); G06Q 20/3437 (2013.01 - EP US); G07F 7/02 (2013.01 - EP US); G07F 7/086 (2013.01 - EP US)
Citation (search report)
- [A] EP 0726659 A2 19960814 - SONY CORP [JP]
- [A] EP 0360615 A2 19900328 - DUBNER COMPUTER SYSTEMS [US]
- [PX] EP 0778566 A2 19970611 - SONY CORP [JP]
- [A] EP 0400906 A2 19901205 - TECHNICOLOR VIDEOCASSETTE OF M [US]
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 0847025 A2 19980610; EP 0847025 A3 20000614; EP 0847025 B1 20040519; CN 1099664 C 20030122; CN 1184999 A 19980617; DE 69729165 D1 20040624; DE 69729165 T2 20050525; JP H10172235 A 19980626; US 6101051 A 20000808
DOCDB simple family (application)
EP 97309451 A 19971124; CN 97125496 A 19971209; DE 69729165 T 19971124; JP 34466396 A 19961209; US 97462897 A 19971119